UIViewController+CustomAnimations

//
//  UIViewController+CustomAnimations.swift
//  NavBarCustomOrientationDemo
//
//  Created by Aleksandar Geyman on 11.03.20.
//  Copyright © 2020 Aleksandar Geyman. All rights reserved.
//

import UIKit

private struct AnimationConstants {
    static let duration = 0.25
}

private enum AnimationType {
    case present
    case dismiss
}

extension UIViewController {

    func presentWithCustomAnimation(viewControllerToPresent: UIViewController, completion: (() -> Void)?) {
        view.window?.layer.add(configureAnimation(for: .present), forKey: kCATransition)
        present(viewControllerToPresent, animated: false, completion: completion)
    }

    func dismissWithCustomAnimation(completion: (() -> Void)?) {
        view.window?.layer.add(configureAnimation(for: .dismiss), forKey: kCATransition)
        dismiss(animated: false, completion: completion)
    }

    private func configureAnimation(for animationType: AnimationType) -> CATransition {
        var type: CATransitionType
        var subType: CATransitionSubtype
        switch animationType {
        case .present:
            type = .push
            subType = .fromRight
        case .dismiss:
            type = .push
            subType = .fromLeft
        }

        let transition = CATransition()
        transition.duration = AnimationConstants.duration
        transition.type = type
        transition.subtype = subType
        return transition
    }
}